Stormwater management for blue and green roofs
Turn your rooftops into active water-retention surfaces
The Nidaroof system enables temporary storage of rainwater directly on the roof, helping to relieve drainage networks and reduce urban runoff.
Installed above the waterproofing membrane, Nidaroof performs both drainage and water-retention functions thanks to its cellular honeycomb structure.
This technology is suitable for a wide range of roof designs:
terraces with pedestal-mounted paving, technical roofs, roof gardens, and even parking decks.
A high-performance solution combining hydraulic efficiency, structural safety and optimal use of rooftop space.
Our products for rooftop stormwater retention
Nidaroof
Honeycomb panels for temporary storage and retention of rainwater on flat roofs and roof terraces.
Product comparison table
Product
Thicknesses
Non-woven – Top face 1
Non-woven – Top face 2
Storage capacity
Nidaroof 1F
40 mm - 60 mm
PET 150 g/m² single-sided
none
40mm = 109 L ; 60 mm = 164 L
View product sheet
Nidaroof 100-2F
100 mm
PET 150g/m2
PET 25g/m2
274 L
View product sheet
Nidaroof 520-2F
520 mm
PET 45g/m2
PET 45g/m2
1423 L
View product sheet
Related case studies
See all our case studies
17 Nov. 2025
17 Nov. 2025
At a glance
Integrated flow regulation
Rooftop storage reduces discharge flow rates and delays runoff.
Versatile applications
Suitable for terrace roofs, roof gardens, technical roofs and trafficable surfaces.
Easy installation
A 95% void cellular structure that is lightweight, easy to handle and quick to install without overloading the roof structure.
Frequently asked questions
How does a rooftop retention system work?
Rainwater is temporarily stored inside the Nidaroof cellular structure, installed above the waterproofing layer.
The water is then released gradually through a flow-control device, reducing runoff and relieving stormwater networks.
On which types of roofs can Nidaroof be installed?
The system is suitable for:
Terrace roofs with pedestal paving
Technical and maintenance roofs
Roof gardens and vegetated roofs
Parking roofs
Its lightweight yet robust design allows easy integration on any load-bearing, waterproofed roof deck.
Is Nidaroof compatible with waterproofing systems?
Yes. Nidaroof is compatible with bituminous waterproofing as well as synthetic membranes.
It can be integrated into full roofing systems such as Wateroof® by Siplast, which hold certified technical approvals ensuring performance and durability.
What benefits does Nidaroof offer to project owners?
By integrating stormwater management directly at roof level, the required volume of underground tanks can be significantly reduced.
This frees valuable land, enhances asset value, and ensures compliance with regulations on stormwater retention and controlled discharge.
Interested in becoming a distributor?
In mainland France, Nidaroof is distributed exclusively by our partner BMI Siplast, within certified technical systems such as Wateroof®.
In other countries, Nidaplast provides direct sales and full technical support to distributors and project owners.
Manufactured in France, Nidaroof is delivered with comprehensive technical assistance, from hydraulic sizing to on-site support.
Our engineering team produces layout plans and technical calculations based on the information provided by the design office or client.
Offer your customers a reliable, lightweight and high-performance rooftop retention solution that complies with sustainable stormwater management regulations.
Proven technical solutions
Our products are developed to meet real on-site requirements: performance, reliability and durability are at the core of every solution.
Committed to reducing environmental impact
At Nidaplast, we design recyclable products that incorporate recycled materials and are manufactured through a controlled industrial process with a low carbon footprint.
Tailored support
Whether technical experts, design-office engineers or sales teams, we support professionals throughout their projects, both nationally and internationally.
